Year | Value | 2022 | 18,881 | 2021 | 18,414 | 2020 | 17,962 | 2019 | 17,463 | 2018 | 16,911 | 2017 | 16,378 | 2016 | 15,878 | 2015 | 15,366 | 2014 | 14,884 | 2013 | 14,469 | 2012 | 14,049 | 2011 | 13,630 | 2010 | 13,268 | 2009 | 12,979 | 2008 | 12,766 | 2007 | 12,614 | 2006 | 12,487 | 2005 | 12,372 | 2004 | 12,262 | 2003 | 12,137 | 2002 | 12,005 | 2001 | 11,888 | 2000 | 11,787 | 1999 | 11,699 | 1998 | 11,617 | 1997 | 11,535 | 1996 | 11,455 | 1995 | 11,378 | 1994 | 11,304 | 1993 | 11,230 | 1992 | 11,159 | 1991 | 11,091 | 1990 | 11,019 | 1989 | 10,942 | 1988 | 10,863 | 1987 | 10,780 | 1986 | 10,695 | 1985 | 10,612 | 1984 | 10,529 | 1983 | 10,448 | 1982 | 10,366 | 1981 | 10,282 | 1980 | 10,195 | 1979 | 10,106 | 1978 | 10,015 | 1977 | 9,924 | 1976 | 9,834 | 1975 | 9,749 | 1974 | 9,670 | 1973 | 9,593 | 1972 | 9,519 | 1971 | 9,443 | 1970 | 9,363 | 1969 | 9,282 | 1968 | 9,206 | 1967 | 9,135 | 1966 | 9,066 | 1965 | 8,997 | 1964 | 8,928 | 1963 | 8,860 | 1962 | 8,792 | 1961 | 8,721 | 1960 | 8,648 |
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